DF-2430 / fix.diff

# DF-2430 fix (authored post-verification; not applied to sys/)
--- a/sys/dev/disk/buslogic/btreg.h
+++ b/sys/dev/disk/buslogic/btreg.h
@@ -635,7 +635,7 @@ struct bt_softc {
 	u_int32_t		 bios_addr;
 	char			 firmware_ver[6];
-	char			 model[5];
+	char			 model[6];
 };